CN116532687B

CN116532687B - Hole forming device of master cylinder piston

Info

Publication number: CN116532687B
Application number: CN202310646024.3A
Authority: CN
Inventors: 李刚; 黄卫; 潘菁; 潘松辉; 潘贤钧
Original assignee: Dachang Automobile Parts Co ltd
Current assignee: Dachang Automobile Parts Co ltd
Priority date: 2023-06-01
Filing date: 2023-06-01
Publication date: 2023-10-27
Anticipated expiration: 2043-06-01
Also published as: CN116532687A

Abstract

The invention belongs to the technical field of manufacturing of master cylinder pistons, and particularly relates to a hole forming device of a master cylinder piston, which comprises the following components: the fixing frame comprises an upper fixing plate, a lower fixing plate and a plurality of guide rods which are arranged between the upper fixing plate and the lower fixing plate and are distributed in a rectangular shape; the sliding seat is arranged on one side of the guide rod, which is close to the upper fixing plate, and is provided with a guide sleeve which is in sliding fit with the guide rod; the driving cylinder is arranged at one end of the upper fixing plate, which faces the sliding seat, and drives the sliding seat to move up and down; the driving motor is arranged on the sliding seat; the outer anti-deflection limiting structure is fixedly arranged on the guide rod at the lower side of the sliding seat; the middle part of the outer deviation prevention limiting structure is provided with a deviation prevention guide mechanism fixedly connected with a driving shaft of the driving motor; the drill chuck is arranged at the other end of the inner deflection preventing guide mechanism; and the piston clamp is arranged on the lower fixing plate.

Description

Hole forming device of master cylinder piston

Technical Field

The invention belongs to the technical field of piston manufacturing, and particularly relates to a hole forming device for a master cylinder piston.

Background

The braking system is a series of special devices capable of forcedly reducing the running speed of the automobile, and mainly comprises an energy supply device, a control device, a transmission device and a brake part, and the braking system has the main functions of decelerating or even stopping the running automobile, keeping the running automobile at a downhill slope stable and keeping the stopped automobile stationary, and the master cylinder piston is a main part in the braking system, and the master cylinder piston also needs holes for drilling after forging and pressing, so that the rotating shaft of the conventional drilling device slightly shakes during drilling, thereby influencing the machining precision, and simultaneously, drill bit is easy to break or crack at the moment that a drill bit butts against a workpiece during drilling, thereby influencing the machining progress and the qualification rate of machined products.

Disclosure of Invention

The invention aims to solve the technical problems, and provides a hole forming device of a master cylinder piston, which has a simple structure, can buffer at the moment of drilling and can prevent the pile head from shaking.

In view of the above, the present invention provides a hole forming device of a master cylinder piston, comprising:

the fixing frame comprises an upper fixing plate, a lower fixing plate and a plurality of guide rods which are arranged between the upper fixing plate and the lower fixing plate and are distributed in a rectangular shape;

The sliding seat is arranged on one side of the guide rod, which is close to the upper fixing plate, and is provided with a guide sleeve which is in sliding fit with the guide rod;

the driving cylinder is arranged at one end of the upper fixing plate, which faces the sliding seat, and drives the sliding seat to move up and down;

the driving motor is arranged on the sliding seat;

the outer anti-deflection limiting structure is fixedly arranged on the guide rod at the lower side of the sliding seat;

the middle part of the outer deviation prevention limiting structure is provided with an inner deviation prevention guide mechanism fixedly connected with a driving shaft of the driving motor;

the drill chuck is arranged at the other end of the inner deflection preventing guide mechanism;

the piston clamp is arranged on the lower fixing plate;

wherein prevent partially limit structure outward includes:

the upper limiting plate is fixedly connected with the guide rod and can be fixed through welding;

the outer limiting sleeve is arranged in the middle of the lower side of the upper limiting plate, a limiting hole is formed in the middle of the outer limiting sleeve, and a through hole which is coaxial with the limiting hole and has the same diameter is formed in the upper limiting plate;

wherein the inner anti-deviation guide mechanism extends out of the outer limit sleeve after passing through the upper end of the upper limit plate.

In the above technical solution, further, the inner anti-deviation guiding mechanism includes:

the upper connecting rod, one end of which is fixedly connected with the driving shaft of the driving motor and can be fixedly connected through a coupler or a bolt;

the middle deviation prevention component is fixedly connected with the other end of the upper connecting rod;

the inner buffer connecting assembly is connected with the middle anti-deflection assembly;

wherein go up the connecting rod and include:

the upper rod body is fixedly connected with an output shaft of the driving motor and penetrates into the outer limit sleeve;

the upper limit disc is propped against the end face of the middle deviation prevention assembly and is fixedly connected with the middle deviation prevention assembly;

the section of the lower limiting part is in a regular polygon shape and extends into the middle deviation prevention assembly;

the middle anti-deviation assembly is arranged in the outer limit sleeve in a sliding way and comprises:

the middle deviation preventing sleeve is communicated at two ends, a hole part matched with the lower limit part is formed in the middle of the middle deviation preventing sleeve, and the upper limit disc is fixedly connected with the end face of the middle deviation preventing sleeve through a bolt;

the outer spiral guide part is integrally formed outside the middle deviation prevention sleeve, and the middle deviation prevention assembly is matched with the outer limit sleeve through the outer spiral guide part;

The outer wall of the outer spiral guide part is provided with a plurality of contact balls which are distributed along the shape of the outer spiral guide part and can freely roll, and the outer spiral guide part is contacted with the outer limit sleeve through the contact balls.

In the above technical solution, further, the middle anti-deviation component further includes:

the outer wall of the outer spiral guide part is provided with a plurality of threaded holes distributed along the shape of the outer spiral guide part, and each threaded hole is fixedly provided with an outer limit bolt in a threaded manner;

wherein outer limit plug includes:

the bolt handle is in threaded connection with the threaded hole;

the bolt head and the bolt handle are integrally formed, and the cross section of the bolt head and the bolt handle is regular polygon;

the limiting spherical groove is formed in the end face of the bolt head inwards, the contact ball rolls freely to be arranged in the limiting spherical groove, and part of the contact ball extends out of the limiting spherical groove;

an inner lubrication hole which extends into the bolt handle and is coaxially arranged with the bolt handle is arranged in the limit spherical groove;

grease filled in the inner lubrication hole;

an outer flow limiting cover is fixedly arranged at the outer side of the inner lubrication hole, and an outer flow limiting hole is arranged on the outer limiting cover;

the outer limiting filter cloth is covered outside the outer limiting hole and is fiber cloth with small meshes and small quantity.

In the above technical solution, further, the inner buffer connection assembly includes:

the upper buffering floating assembly is arranged in the middle anti-deflection sleeve;

the lower buffering floating assembly is arranged at the lower end of the middle anti-deflection sleeve and is fixedly connected with the upper buffering floating assembly;

wherein the upper buffer float assembly comprises:

the upper end of the upper floating connecting rod is fixedly connected with the lower limiting part;

the upper floating maintaining assembly is sleeved on the lower side of the upper floating connecting rod and is in sliding fit with the upper floating connecting rod;

a middle floating retainer fixedly provided at a lower side of the upper buffer floating assembly;

a lower floating maintaining assembly arranged at the lower side of the middle floating maintaining piece;

the lower floating connecting rod is inserted on the lower floating retainer component at one end and is in sliding fit with the lower floating retainer component;

wherein, the two ends of the middle floating retainer are respectively inserted into the end surfaces of the upper floating connecting rod and the lower floating connecting rod and are fixedly connected.

In the above technical scheme, further, the upper floating connecting rod and the lower floating connecting rod are both regular hexagons, one end of each of the upper floating connecting rod and the lower floating connecting rod is provided with a floating connecting part with a frustum-shaped section, the cross-sectional area of each of the floating connecting parts is gradually decreased in the direction towards the end face of the bottom of each of the floating connecting parts, the floating connecting parts of the upper floating connecting rods are downwards arranged, and the floating connecting parts of the lower floating connecting rods are upwards arranged;

Wherein the upper floating retainer assembly and the lower floating retainer assembly are identical in structure and symmetrically arranged with each other, and each of the upper floating retainer assembly and the lower floating retainer assembly comprises:

the outer cone-shaped retaining block is coaxially provided with a floating hole, one end of the floating hole is polygonal, and a frustum-shaped contraction opening which is matched with the floating connecting part and limits the floating connecting part and prevents the floating connecting part from moving outwards;

the side floats the connecting piece, and a plurality of side floats the connecting piece according to circumference evenly distributed in the outside of outer cone shape holding piece, and the side floats the connecting piece and includes:

the floating abutting block is arranged towards the outer wall of the outer cone-shaped retaining block, and a cambered surface top is formed on one side of the floating abutting block towards the outer cone-shaped retaining block;

the end part of the cambered surface top is inwards provided with a spherical mounting groove, a floating ball capable of freely rolling is arranged in the spherical mounting groove, the side floating connecting piece is propped against the outer cone-shaped retaining block through the floating ball, and the side wall of the outer cone-shaped retaining block is provided with an inner limit groove matched with the floating ball;

the floating spring is arranged on the inner wall of the middle anti-deflection sleeve, the floating spring is arranged in the floating hole, the floating contact block forms a contact part in the floating hole, and the end surface of the contact part forms a rod part which is coaxially arranged with the floating spring in the floating hole.

In the above technical solution, further, the intermediate floating retainer includes:

the two end connecting rods are arranged symmetrically up and down, the upper end connecting rod is fixedly connected with the upper floating connecting rod, the lower end connecting rod is fixedly connected with the lower floating connecting rod, and the section of the end connecting rod is in a regular polygon;

the middle retaining sleeve is arranged between the two end connecting rods, two ends of the middle retaining sleeve are provided with limiting end covers, the limiting end covers are provided with regular polygon holes for the end connecting rods to be inserted, and regular polygon inner holes are formed in the middle retaining sleeve;

the two sides in the middle retaining sleeve are respectively provided with an end limiting bolt for limiting one end of the end connecting rod in the middle retaining sleeve, and the section of the end limiting bolt is in a regular polygon matched with the inner hole of the middle retaining sleeve;

the middle disc spring is arranged in the middle retaining sleeve, and two ends of the middle disc spring are respectively propped against the end faces of the end limiting bolts;

the middle part of the middle holding sleeve is outwards extended to form an annular supporting disc, two sides of the supporting disc are respectively provided with an outer supporting spring, and two ends of the outer supporting spring are respectively propped against the supporting disc and the bottom end face of the outer cone-shaped holding block at the side where the outer supporting spring is located.

In the above technical solution, further, the lower buffer floating assembly includes:

the upper end of the outer floating connecting component is fixedly connected with the lower end of the middle anti-deflection sleeve, and the lower end of the outer floating connecting component is connected with the drill chuck;

the upper end of the inner floating connecting component is fixedly connected with the lower end of the lower floating connecting rod, and the other end of the inner floating connecting component extends into the bottom of the outer floating connecting component and is in sliding fit with the bottom of the outer floating connecting component;

wherein the outer floating connection assembly comprises:

the upper support sleeve is fixedly connected with the lower end of the middle anti-deflection sleeve, and a regular polygon upper support part is formed on the lower side of the upper support sleeve; the upper part of the upper supporting sleeve is provided with a regular polygon connecting groove, the middle anti-deflection sleeve is correspondingly provided with a connecting lug matched with the regular polygon connecting groove, and the connecting lug is inserted into the regular polygon connecting groove and then reinforced by a bolt;

the upper limiting sleeve is sleeved outside the lower side of the upper supporting sleeve, an upper limiting hole matched with the upper supporting part is formed in the upper limiting sleeve, an upper limiting cover is arranged at the upper end of the upper limiting sleeve in a threaded connection manner, an upper limiting edge is formed at the upper side of the upper limiting cover, and an upper limiting groove matched with the upper limiting edge in a sliding manner is formed on the side wall of the upper supporting sleeve;

The lower support sleeve is integrally formed at the lower side of the upper limit sleeve, a regular polygon lower support part is formed at the lower part of the lower support sleeve, and the lower support part can be fixed by welding;

the lower limit sleeve is sleeved on the lower side of the lower support sleeve, a lower limit hole matched with the lower support part is formed in the lower limit sleeve, a lower limit cover is arranged at the upper end of the lower limit sleeve in a threaded connection mode, a lower limit edge is formed on the upper side of the lower limit cover, and a lower limit groove matched with the lower limit edge in a sliding mode is formed on the side wall of the lower support sleeve. The drill chuck is fixed at the downside of lower limit sleeve, and is provided with pressure sensor between drill chuck and lower limit sleeve.

In the above technical solution, further, the inner floating connection assembly includes:

the inner floating connecting rod is coaxially arranged with the outer floating connecting assembly;

the inner floating connecting rod comprises a diameter decreasing part and sequentially arranged:

an upper sealing edge is formed at the upper part of the upper supporting sleeve, an upper bearing hole is formed in the middle of the upper sealing edge, an upper sealing ring is arranged on the inner wall of the upper bearing hole, and the upper rod part is in sliding fit with the upper bearing hole;

the middle rod part is positioned in the upper limit sleeve and the upper support sleeve;

The lower rod part is formed with a lower sealing edge at the lower part of the upper limit sleeve, a lower bearing hole is formed in the middle of the lower sealing edge, a lower sealing groove is formed in the inner wall of the lower bearing hole, a lower sealing piece is arranged in the lower sealing groove, and the lower rod part penetrates through the lower bearing hole and extends to the bottom of the lower limit sleeve;

wherein, a compression gap is formed between the lower end surface of the middle rod part and the lower sealing edge; a lower sliding hole in sliding fit with the lower rod part is formed at the bottom of the lower limit sleeve, the cross section of the lower sliding hole is in a regular polygon shape, and the bottom of the lower rod part is matched with the lower sliding hole; a lower buffer gap is formed between the bottom of the lower sliding hole and the end face of the lower rod part, an inner sealing groove is arranged on the inner wall of the lower sliding hole, and an inner sealing ring is arranged on the inner sealing groove. The compression gap and the lower buffer gap can provide a certain space for the floating of the inner floating connecting rod.

In the above technical solution, further, the inner floating connection assembly further includes:

the lower side of the lower supporting sleeve is provided with a lower anti-drop cover, the middle part of the lower anti-drop cover is provided with an anti-drop hole, the inner supporting sleeve passes through the anti-drop hole, the upper end of the inner supporting sleeve is provided with an anti-drop edge propped against the end face of the lower anti-drop cover, and an upper buffer gap is formed between the lower end of the inner supporting sleeve and the bottom of the lower limiting sleeve;

The lower buffer disc spring is arranged in the lower support sleeve, one end of the lower buffer disc spring is propped against the lower sealing edge, and the other end of the lower buffer disc spring is propped against the anti-falling edge;

the upper supporting sleeve is communicated with the upper limiting sleeve, and the upper supporting sleeve and the upper limiting sleeve are filled with upper buffer filling liquid;

the lower supporting sleeve and the lower limiting sleeve are filled with lower buffer filling liquid;

the lower rod part passes through the middle part of the inner receiving sleeve, a buffer connecting cavity is formed between the inner wall of the inner receiving sleeve and the lower rod part, and the lower supporting sleeve is communicated with the lower limiting sleeve through the buffer connecting cavity; and a plurality of buffer connection holes communicated with the buffer connection cavity are arranged on the side wall of the inner bearing sleeve.

an inner floating buffer spring is arranged in the lower sliding hole, and two ends of the inner floating buffer spring respectively prop against the bottom of the lower sliding hole and the bottom end face of the lower rod part;

the inner buffer filling liquid is filled in the lower sliding hole;

an inner connecting runner which is formed on the lower rod part and is used for communicating the lower sliding hole with the buffer connecting cavity, wherein a first connecting pore canal and a second connecting pore canal are formed on one side of the inner connecting runner, which is connected with the lower sliding hole;

An inward one-way component is arranged on the first connecting pore canal;

the second connecting pore canal is provided with an outward unidirectional component;

the first connecting pore canal is in a stepped hole shape, and comprises a first inward hole, a second inward hole and a third inward hole, wherein the diameters of the first inward hole, the second inward hole and the third inward hole are gradually decreased from the end face of the lower rod part; the inward one-way assembly comprises a limiting plug which is in threaded connection with a first inward hole, an inward conical hole is formed in the middle of the limiting plug, the diameter of the inward conical hole decreases inwards from the end face of the lower rod part, an inward valve ball capable of blocking the inward conical hole is arranged at the inner side of the inward conical hole, an inward supporting spring is arranged in a second inward hole, one end of the inward supporting spring abuts against the end face of the second inward hole, and the other end of the inward supporting spring abuts against the inward valve ball;

the second connecting pore canal inwards comprises a first outwards hole with a decreasing diameter from the end surface of the lower rod part, an outwards conical hole and a second outwards hole, the outwards unidirectional component comprises a limiting plug sleeve, the limiting plug sleeve is in threaded connection with the first outwards hole, a closed end is formed on one side of the limiting plug sleeve, which faces the end surface of the lower rod part, an outwards flow passage hole is formed on the closed end, an outwards guide spring is arranged in the limiting plug sleeve, and an outwards valve ball capable of blocking the outwards conical hole is arranged on the outwards conical hole; one end of the outer guide spring is propped against the outward valve ball, and the other end is propped against the closed end of the limiting plug bush.

The beneficial effects of the invention are as follows:

1. the shaking condition of the transmission shaft can be reduced through the cooperation of the outer deviation prevention limiting structure and the inner deviation prevention guiding mechanism;

2. the upper buffer floating assembly and the lower buffer floating assembly can buffer and protect the drill bit at the moment of pressing down the drill bit, so that the damage probability of the drill bit is reduced; 3. the arrangement of the inner floating connecting assembly can further improve the integral buffering protection effect of the inner anti-deflection guide mechanism.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the outer anti-deflection limiting structure and the inner anti-deflection guiding mechanism of the invention;

FIG. 3 is a schematic view of the structure of the inner anti-deviation guide mechanism of the present invention;

FIG. 4 is a schematic view of the structure of the outer limit plug according to the present invention;

FIG. 5 is a schematic view of the structure of the intermediate floating retainer of the present invention;

FIG. 6 is a schematic view of the structure of the lower buffer floating assembly of the present invention;

FIG. 7 is a schematic view of the lower limit sleeve and lower rod part of the present invention; the label in the figure is: 1-upper fixed plate, 2-lower fixed plate, 3-sliding seat, 4-driving cylinder, 5-driving motor, 6-drill chuck, 7-upper limit plate, 8-outer limit sleeve, 9-upper rod body, 10-upper limit disk, 11-lower limit part, 12-middle deviation prevention sleeve, 13-outer spiral guide part, 14-contact ball, 15-outer limit bolt, 15 a-bolt handle, 15 b-bolt head, 15 c-inner lubrication hole, 15 d-outer limit cover, 15 e-outer limit filter cloth, 16-upper floating connecting rod, 17-lower floating connecting rod, 18-outer cone-shaped retainer, 19-floating hole, 20-floating connecting part, 21-floating conflict block, 22-floating ball, 23-inner limit groove 24-floating spring, 25-end connecting rod, 26-middle retaining sleeve, 27-limit end cover, 28-end limit bolt, 29-middle belleville spring, 30-outer support spring, 31-support disc, 32-upper support sleeve, 33-upper limit sleeve, 34-upper limit cover, 35-lower support sleeve, 36-lower limit sleeve, 37-lower limit cover, 38-upper rod, 39-middle rod, 40-lower rod, 41-upper seal ring, 42-inner seal ring, 43-inner receiving sleeve, 44-lower anti-drop cover, 45-lower buffer belleville spring, 46-upper seal edge, 47-lower seal edge, 48-anti-drop edge, 49-inner communication runner, 50-lower slide hole, 51-limit plug, 52-inward valve ball, 53-inward supporting spring, 54-limit plug, 55-outward valve ball, 56-outward guide spring, 57-inward floating buffer spring, 58-guide rod and 59-pressure sensor.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present application, fall within the scope of protection of the present application.

Example 1:

the present embodiment provides a hole forming device of a master cylinder piston, including:

the fixing frame comprises an upper fixing plate 1, a lower fixing plate 2 and a plurality of guide rods 58 which are arranged between the upper fixing plate 1 and the lower fixing plate 2 and are distributed in a rectangular shape;

the sliding seat 3 is arranged on one side of the guide rod 58, which is close to the upper fixed plate 1, and the sliding seat 3 is provided with a guide sleeve which is in sliding fit with the guide rod 58;

a driving cylinder 4, wherein one end of the upper fixed plate 1 facing the sliding seat 3 is provided with the driving cylinder 4 for driving the sliding seat 3 to move up and down;

a drive motor 5, the drive motor 5 being provided on the slide seat 3;

the outer anti-deflection limiting structure is fixedly arranged on a guide rod 58 at the lower side of the sliding seat 3;

the middle part of the outer deviation prevention limit structure is provided with an inner deviation prevention guide mechanism fixedly connected with a driving shaft of the driving motor 5;

A drill chuck 6, the other end of the inner deflection preventing guide mechanism is provided with the drill chuck 6;

a piston clamp is arranged on the lower fixed plate 2;

wherein prevent partially limit structure outward includes:

the upper limiting plate 7 is fixedly connected with the guide rod 58 and can be fixed by welding;

the outer limit sleeve 8 is arranged in the middle of the lower side of the upper limit plate 7, a limit hole is formed in the middle of the outer limit sleeve 8, and a through hole which is coaxial with the limit hole and has the same diameter is formed in the upper limit plate 7;

wherein the inner anti-deviation guide mechanism extends out of the outer limit sleeve after passing through the upper end of the upper limit plate 7.

In the embodiment, the outer anti-deviation limiting mechanism is arranged to prevent the rotating shaft from shaking in the hole rotating process, so that the machining precision is ensured; the inner deflection preventing guide mechanism can play a role in floating and buffering in the hole rotating process, the probability of drill bit breakage is reduced, and the rotation shaft is further prevented from shaking by the aid of the outer deflection preventing limit structure; wherein the upper and lower limiting plates of the outer anti-deflection limiting structure can facilitate the installation and fixation thereof; the arrangement of the outer limit sleeve 8 can play a good guiding role in the up-and-down movement and rotation process of the inner anti-deflection guide mechanism, so that a certain anti-deflection effect is achieved.

Example 2:

the present embodiment provides a hole forming device of a master cylinder piston, which has the following technical features in addition to the technical scheme including the above embodiment.

Wherein interior deviation preventing guiding mechanism includes:

the upper connecting rod, one end of which is fixedly connected with the driving shaft of the driving motor 5 and can be fixedly connected through a coupler or a bolt;

wherein go up the connecting rod and include:

the upper rod body 9, the upper rod body 9 is fixedly connected with the output shaft of the driving motor 5 and penetrates into the outer limit sleeve 8;

the upper limit disc 10 is propped against the end face of the middle deviation prevention component and is fixedly connected with the middle deviation prevention component;

the section of the lower limiting part 11 is in a regular polygon shape and extends into the middle anti-deflection component;

the middle anti-deviation assembly is arranged in the outer limit sleeve 8 in a sliding way and comprises:

the middle deviation prevention sleeve 12 is communicated with two ends of the middle deviation prevention sleeve 12, a hole part matched with the lower limit part 11 is formed in the middle of the middle deviation prevention sleeve 12, and the upper limit disc 10 is fixedly connected with the end surface of the middle deviation prevention sleeve 12 through bolts;

The outer spiral guide part 13 is integrally formed outside the middle deviation prevention sleeve 12, and the middle deviation prevention assembly is matched with the outer limit sleeve 8 through the outer spiral guide part 13;

the contact balls 14 are arranged on the outer wall of the outer spiral guide part 13, a plurality of contact balls 14 which can freely roll along the shape of the outer spiral guide part 13 are arranged on the outer wall of the outer spiral guide part 13, and the outer spiral guide part 13 is contacted with the outer limit sleeve 8 through the contact balls 14.

In the embodiment, the upper connecting rod can facilitate the fixed connection of the inner deviation prevention guide mechanism and the driving shaft of the motor, the middle deviation prevention component is used for being matched with the outer limit sleeve 8, the inner buffer connection component is used for further transmitting torque and ensuring that the drill bit can have certain axial float in the drilling process, and the drill bit is well buffered and protected; the upper connecting rod is fixedly connected with the output shaft of the motor through the upper rod body 9, the upper limit disc 10 can be conveniently connected with the middle deviation prevention component, and the lower limit part 11 can better transmit torque to the middle deviation prevention component; the middle anti-deflection component slides and rotates to be positioned in the outer limit sleeve 8 by the driving of the driving cylinder 4 and the driving motor 5; the middle anti-deflection sleeve 12 is better connected with the upper connecting rod part, and the outer spiral guide part 13 is contacted with the inner wall of the outer limit sleeve 8 to play a role in preventing deflection and shaking; the freely rolling contact balls 14 are provided for reducing friction between the outer screw guide 13 and the outer limit sleeve 8, while maintaining a positive anti-deflection effect.

Example 3:

The intermediate anti-deflection assembly further comprises:

the outer limiting bolt 15 is arranged on the outer wall of the outer spiral guide part 13, a plurality of threaded holes are distributed along the shape of the outer spiral guide part 13, and each threaded hole is fixedly provided with the outer limiting bolt 15 in a threaded manner;

wherein the outer limit stud 15 comprises:

a bolt handle 15a, the bolt handle 15a is connected with the threaded hole in a threaded manner;

the bolt head 15b, the bolt head 15b and the bolt handle 15a are integrally formed and the section of the bolt head 15b is a regular polygon;

the limiting spherical groove is formed in the end face of the bolt head 15b inwards, the contact ball 14 freely rolls to be arranged in the limiting spherical groove, and part of the contact ball extends out of the limiting spherical groove;

an inner lubrication hole 15c, wherein the inner lubrication hole 15c extending into the bolt handle 15a and coaxially arranged with the bolt handle 15a is arranged in the limit spherical groove;

grease filled in the inner lubrication hole 15c;

an outer flow limiting cover 15d, wherein the outer side of the inner lubrication hole 15c is fixedly provided with an outer flow limiting cover 15d, and the outer limiting cover is provided with an outer flow limiting hole;

the outer limiting filter cloth 15e is covered with the outer limiting filter cloth 15e outside the outer limiting hole, and the outer limiting filter cloth is fiber cloth with small meshes and small quantity.

In the present embodiment, the outer limit pins 15 are used for mounting and fixing the contact balls 14; the bolt handle 15a of the outer limit bolt 15 is used for being fixed with the outer spiral guide part 13, and the structure of threaded connection can be convenient for replacement and maintenance; the regular polygon bolt head 15b can facilitate the installation of the outer limit bolt 15; the limit spherical grooves can be used for placing the contact balls 14 and preventing the contact raceways from sliding out; the inner lubrication hole 15c can be used for filling grease, and good lubrication is achieved on the contact balls 14 through the grease; the outer current limiting filter cloth 15e of the outer current limiting cover 15d can limit the grease to slowly flow out, so that the number of times of supplementing the grease is reduced, and meanwhile, the lubricating effect can be ensured.

Example 4:

The inner buffer connection assembly includes:

an upper buffer float assembly disposed within the intermediate anti-deflection sleeve 12;

the lower buffering floating assembly is arranged at the lower end of the middle anti-deflection sleeve 12 and is fixedly connected with the upper buffering floating assembly;

wherein the upper buffer float assembly comprises:

the upper floating connecting rod 16, the upper end of the upper floating connecting rod 16 is fixedly connected with the lower limit part 11;

An upper floating maintaining assembly which is sleeved on the lower side of the upper floating connecting rod 16 and is in sliding fit with the upper floating connecting rod 16;

a lower floating connecting rod 17, one end of the lower floating connecting rod 17 is inserted on the lower floating retainer assembly and is in sliding fit with the lower floating retainer assembly;

wherein both ends of the middle floating retainer are respectively inserted into the end surfaces of the upper floating connecting rod 16 and the lower floating connecting rod 17 and fixedly connected.

In this embodiment, the floating buffering floating assembly plays a role in certain floating buffering in the middle anti-deflection sleeve 12, and the arrangement of the lower buffering floating assembly can play a good role in floating buffering at the lower end of the middle anti-deflection sleeve 12; the upper floating connecting rod 16 and the lower floating connecting rod 17 in the upper buffering floating assembly are used for connecting the upper connecting rod and the lower floating maintaining assembly, and good connection can be ensured when the upper floating maintaining assembly and the lower floating maintaining assembly are slightly inclined, and one ends of the upper floating connecting rod 16 and the lower floating connecting rod 17 are respectively limited by the upper floating maintaining assembly and the lower floating maintaining assembly so as to prevent the upper floating connecting rod 16 and the lower floating maintaining assembly from being separated; the intermediate floating retainer assembly serves to both cushion and connect the upper and lower floating links 16 and 17 while providing good cushion support between the upper and lower floating retainer assemblies.

Example 5:

The upper floating connecting rod 16 and the lower floating connecting rod 17 are both regular hexagons, one end of each floating connecting rod is provided with a floating connecting part 20 with a conical section, the cross section area of each floating connecting part 20 decreases in the direction of the bottom end face of each floating connecting part 20, the floating connecting parts 20 of the upper floating connecting rod 16 are arranged downwards, and the floating connecting parts 20 of the lower floating connecting rods 17 are arranged upwards;

the outer cone-shaped retainer block 18, the outer cone-shaped retainer block 18 is coaxially provided with a floating hole 19, the floating hole 19 is polygonal, and one end of the floating hole is provided with a frustum-shaped contraction opening which is matched with the floating connecting part 20 and limits the floating connecting part 20 and prevents the floating connecting part 20 from moving outwards in the outer cone-shaped retainer block 18;

side floating connectors, a plurality of side floating connectors are evenly distributed in the outside of outer cone-shaped holding piece 18 according to circumference, and side floating connectors include:

a floating abutting block 21, wherein the floating abutting block 21 is arranged towards the outer wall of the outer cone-shaped retaining block 18, and a cambered surface top is formed on one side of the floating abutting block 21 towards the outer cone-shaped retaining block 18;

A floating ball 22, a ball-shaped setting groove is formed inwards at the end part of the cambered surface top, a floating ball 22 capable of freely rolling is arranged in the ball-shaped setting groove, a side floating connecting piece is propped against the outer cone-shaped retaining block 18 through the floating ball 22, and an inner limit groove 23 matched with the floating ball 22 is arranged on the side wall of the outer cone-shaped retaining block 18;

the floating spring 24 is provided with a floating hole 19 on the inner wall of the middle anti-deflection sleeve 12, the floating spring 24 is provided in the floating hole 19, the floating contact block 21 forms a contact part into the floating hole 19, and a rod part coaxially provided with the floating spring 24 is formed in the floating hole 19 at the end surface of the contact part.

In this embodiment, the floating connection portion 20 can prevent the floating connection rod from moving into the floating holding assembly when buffered, and ensure that the floating connection rod can well press the floating holding assembly, so that a part of pressure can be transferred to the floating holding assembly when the whole rotating shaft is pressurized; the outer cone-shaped retaining block 18 in the floating retaining assembly can have good elastic contact effect on the floating connecting part 20, and meanwhile, the cooperation of the side floating connecting piece can ensure good elastic supporting and resetting effects on the floating retaining assembly; meanwhile, the frustum-shaped floating connecting part 20 is matched with the frustum-shaped shrinkage opening, so that torque transmission can be better realized; the floating contact blocks in the side floating connecting pieces can facilitate the arrangement of the floating balls 22, the arrangement of the floating balls 22 can reduce friction between the side floating connecting pieces and the outer cone-shaped retaining blocks 18, and meanwhile, the arrangement of the floating springs 24 can ensure good elastic supporting effect of the outer cone-shaped retaining blocks 18; the arrangement of the inner limit groove 23 can prevent the side floating connecting piece from disengaging and the outer cone-shaped retaining block 18 from rotating; thereby providing good elastic support and limiting for the outer cone-shaped retaining block 18.

Example 6:

The intermediate floating retainer comprises:

the two end connecting rods 25 are arranged symmetrically up and down, the upper end connecting rod 25 is fixedly connected with the upper floating connecting rod 16, the lower end connecting rod 25 is fixedly connected with the lower floating connecting rod 17, and the section of the end connecting rod 25 is in a regular polygon;

an intermediate holding sleeve 26, an intermediate holding sleeve 26 is arranged between the two end connecting rods 25, two ends of the intermediate holding sleeve 26 are provided with limiting end covers 27, the limiting end covers 27 are provided with regular polygon holes for the end connecting rods 25 to be inserted, and regular polygon inner holes are formed in the intermediate holding sleeve 26;

the end limiting bolts 28 are respectively arranged on two sides in the middle retaining sleeve 26, the end limiting bolts 28 limiting one end of the end connecting rod 25 in the middle retaining sleeve 26 are respectively arranged on two sides in the middle retaining sleeve 26, and the cross section of each end limiting bolt 28 is in a regular polygon matched with the inner hole of the middle retaining sleeve 26;

a middle disc spring 29, wherein the middle disc spring 29 is arranged in the middle retaining sleeve 26, and two ends of the middle disc spring 29 are respectively propped against the end surfaces of the end limiting bolts 28;

The outer support springs 30 are formed by extending outwards from the middle of the middle retaining sleeve to form annular support plates 31, the outer support springs 30 are respectively arranged on two sides of the support plates 31, and two ends of each outer support spring 30 respectively abut against the support plates 31 and the bottom end faces of the outer cone-shaped retaining blocks 18 on the side where the outer support springs are located.

In the present embodiment, the end connecting rod 25 is used to connect the upper floating connecting rod 16 and the lower floating connecting rod 17 while transmitting torque, and the middle retaining sleeve 26 is used to limit the other end of the section connecting rod; the end connecting rod 25 can be limited on the middle retaining sleeve 26 in a sliding way through the end limiting bolt 28, and meanwhile, the end connecting rod 25 can be prevented from rotating; the middle disc spring 29 can better play a good elastic support between the two end connecting rods 25; the outer supporting springs 30 can play a good elastic supporting role on the two outer cone-shaped holding blocks 18, so that certain floating and buffering effects can be guaranteed during drilling, and the service life of the whole equipment is prolonged.

Example 7:

The lower buffer floating assembly includes:

The upper end of the outer floating connecting component is fixedly connected with the lower end of the middle anti-deflection sleeve 12, and the lower end of the outer floating connecting component is connected with the drill chuck 6;

the upper end of the inner floating connecting component is fixedly connected with the lower end of the lower floating connecting rod 17, and the other end of the inner floating connecting component extends into the bottom of the outer floating connecting component and is in sliding fit with the bottom of the outer floating connecting component;

wherein the outer floating connection assembly comprises:

an upper support sleeve 32, wherein the upper support sleeve 32 is fixedly connected with the lower end of the middle anti-deflection sleeve 12, and a regular polygon upper support part is formed at the lower side of the upper support sleeve 32; the upper part of the upper supporting sleeve 32 is provided with a regular polygon connecting groove, the middle anti-deflection sleeve 12 is correspondingly provided with a connecting lug matched with the regular polygon connecting groove, and the connecting lug is inserted into the regular polygon connecting groove and then is reinforced by a bolt;

the upper limit sleeve 33 is sleeved outside the lower side of the upper support sleeve 32, an upper limit hole matched with the upper support part is formed in the upper limit sleeve 33, an upper limit cover 34 is arranged at the upper end of the upper limit sleeve 33 in a threaded connection manner, an upper limit edge is formed at the upper side of the upper limit cover 34, and an upper limit groove matched with the upper limit edge in a sliding manner is formed on the side wall of the upper support sleeve 32;

The lower support sleeve 35, the lower support sleeve 35 of the integrated into one piece of lower side of upper limit sleeve 33, the inferior part of the lower support sleeve 35 forms the lower support part of the regular polygon, the lower support part can be fixed through welding;

the lower limit sleeve 36 is sleeved on the lower side of the lower support sleeve 35, a lower limit hole matched with the lower support part is formed in the lower limit sleeve 36, a lower limit cover 37 is arranged at the upper end of the lower limit sleeve 36 in a threaded connection mode, a lower limit edge is formed on the upper side of the lower limit cover 37, and a lower limit groove matched with the lower limit edge in a sliding mode is formed on the side wall of the lower support sleeve 35. The drill chuck 6 is fixed to the underside of the lower limit sleeve 36, and a pressure sensor 59 is provided between the drill chuck 6 and the lower limit sleeve 36.

In this embodiment, the outer floating connector plays a good role in expansion and contraction and floating buffering on the outer side of the lower end of the middle holding sleeve 26, and the inner floating connector plays a good role in expansion and buffering and damping on the inner side of the lower end of the middle holding sleeve 26; the upper support sleeve 32 and the upper limit sleeve 33 are matched, so that good torque transmission can be realized, and the telescopic floating effect can be realized; the cooperation of the lower limit sleeve 36 and the lower support sleeve 35 can further play a role in floating, telescoping and torque transmission; meanwhile, the pressure sensor 59 is arranged to detect the pressure between the drill chuck 6 and the lower limit sleeve 36, and the controller arranged in the equipment adjusts the drilling speed of the corresponding drilling hole according to the pressure, so that the drilling effect and the qualification rate of the finished product can be better ensured, and the service life of the drill bit can be prolonged.

Example 8:

The inner floating connection assembly includes:

an upper rod portion 38, an upper sealing edge 46 is formed at the upper part of the upper supporting sleeve 32, an upper bearing hole is formed in the middle of the upper sealing edge 46, an upper sealing ring 41 is arranged on the inner wall of the upper bearing hole, and the upper rod portion 38 is in sliding fit with the upper bearing hole;

a middle rod 39 located within the upper limit sleeve 33 and the upper support sleeve 32;

the lower rod part 40, a lower sealing edge 47 is formed at the lower part of the upper limit sleeve 33, a lower bearing hole is formed in the middle of the lower sealing edge 47, a lower sealing groove is formed in the inner wall of the lower bearing hole, a lower sealing piece is arranged in the lower sealing groove, and the lower rod part 40 penetrates through the lower bearing hole and extends to the bottom of the lower limit sleeve 36;

wherein a compression gap is formed between the lower end surface of the middle rod part 39 and the lower sealing edge; a lower sliding hole 50 in sliding fit with the lower rod part 40 is formed at the bottom of the lower limit sleeve 36, the cross section of the lower sliding hole 50 is a regular polygon, and the bottom of the lower rod part 40 is matched with the lower sliding hole 50; a lower buffer gap is formed between the bottom of the lower sliding hole 50 and the end surface of the lower rod portion 40, and an inner seal groove is provided on the inner wall of the lower sliding hole 50, and an inner seal ring 42 is provided on the inner seal groove. The compression gap and the lower buffer gap can provide a certain space for the floating of the inner floating connecting rod.

In this embodiment, the inner floating connecting rod can better connect the upper buffer floating assembly with the lower buffer floating assembly; and the upper stem 38 is a sliding fit with the upper receiving aperture. The bottom of the lower rod part 40 is in sliding fit with the lower sliding hole 50, so that the inner floating connecting rod can axially float, and the buffering and shock absorbing effects can be well ensured; the sealing performance between the upper limit sleeve 33 and the upper support sleeve 32 can be ensured by arranging the upper seal ring 41, and the sealing performance of the lower limit sleeve 36 can be ensured by arranging the inner seal ring 42, so that a sealed cavity is formed, and a good buffering and floating effect can be achieved by extruding air in the telescoping process.

Example 9:

The inner floating connection assembly further comprises:

the lower side of the lower supporting sleeve 35 is provided with a lower anti-drop cover 44, the middle part of the lower anti-drop cover 44 is provided with an anti-drop hole, the inner supporting sleeve 43 passes through the anti-drop hole, the upper end of the inner supporting sleeve 43 is provided with an anti-drop edge 48 propped against the end face of the lower anti-drop cover 44, and an upper buffer gap is formed between the lower end of the inner supporting sleeve 43 and the bottom of the lower limiting sleeve 36;

A lower buffer disc spring 45, wherein the lower buffer disc spring 45 is arranged in the lower supporting sleeve 35, one end of the lower buffer disc spring is propped against the lower sealing edge 47, and the other end of the lower buffer disc spring is propped against the anti-falling edge 48;

the upper buffer filling liquid is communicated with the upper supporting sleeve 32 and the upper limiting sleeve 33, and the upper supporting sleeve 32 and the upper limiting sleeve 33 are filled with the upper buffer filling liquid;

the lower buffer filling liquid is filled in the lower support sleeve 35 and the lower limit sleeve 36;

wherein the lower rod part 40 passes through the middle part of the inner receiving sleeve 43, a buffer connecting cavity is formed between the inner wall of the inner receiving sleeve 43 and the lower rod part 40, and the lower supporting sleeve 35 is communicated with the lower limiting sleeve 36 through the buffer connecting cavity; and a plurality of buffer connection holes communicated with the buffer connection cavity are arranged on the side wall of the inner receiving sleeve 43.

In this embodiment, the cooperation of the inner receiving sleeve 43 and the lower buffer belleville spring 45 can elastically support and buffer the lower limiting sleeve 36 during the process of retracting the lower supporting sleeve 35 into the lower limiting sleeve 36, so as to further ensure the floating and buffering performance of the outer floating connection assembly; the filled upper buffer filling liquid and lower buffer filling liquid can play a good role in buffering when the upper support sleeve 32, the upper limit sleeve 33, the lower support sleeve 35 and the lower limit sleeve 36 are extruded, so that the integral spring buffering and supporting effect of the outer floating connecting assembly is better ensured.

Example 10:

The inner floating connection assembly further comprises:

an inner floating buffer spring 57, wherein the inner floating buffer spring 57 is arranged in the lower sliding hole 50, and two ends of the inner floating buffer spring 57 respectively prop against the bottom of the lower sliding hole 50 and the bottom end face of the lower rod part 40;

an inner buffer filling liquid filled in the lower slide hole 50;

an inner communication flow passage 49, which is formed on the lower rod portion 40 to communicate the lower sliding hole 50 with the inner communication flow passage 49 of the buffer connection chamber, wherein a first connection hole and a second connection hole are formed at one side of the inner communication flow passage connected with the lower sliding hole 50;

an inward one-way component is arranged on the first connecting pore canal;

wherein the first connecting hole is in a stepped hole shape, and comprises a first inward hole with decreasing diameter inwards from the end surface of the lower rod part 40, a second inward hole and a third inward hole; the inward unidirectional assembly comprises a limit plug 51, the limit plug is in threaded connection with a first inward hole, an inward conical hole is formed in the middle of the limit plug, the diameter of the inward conical hole decreases inwards from the end face of the lower rod part 40, an inward valve ball 52 capable of blocking the inward conical hole is arranged at the inner side of the inward conical hole, an inward supporting spring 53 is arranged in a second inward hole, one end of the inward supporting spring 53 abuts against the end face of the second inward hole, and the other end abuts against the inward valve ball 52;

The second connecting pore canal is stepped and inwards comprises a first outwards hole with a diameter decreasing from the end surface of the lower rod part 40, an outwards conical hole and a second outwards hole, the outwards unidirectional component comprises a limiting plug 54, the limiting plug 54 is in threaded connection with the first outwards hole, a closed end is formed on one side of the limiting plug 54, which faces the end surface of the lower rod part 40, an outwards flow passage hole is formed on the closed end, an outwards flow guide spring 56 is arranged in the limiting plug 54, and an outwards valve ball 55 capable of blocking the outwards conical hole is arranged on the outwards conical hole; one end of the outer guide spring 56 is propped against the outward valve ball 55, and the other end is propped against the closed end of the limiting plug 54.

In this embodiment, the inner floating buffer spring 57 can play a good supporting role between the lower sliding hole 50 and the lower rod portion 40, and the inner buffer filling liquid can provide a good damping effect when the lower rod portion 40 moves to the bottom of the lower sliding hole 50, so as to play roles of buffering and damping; the arrangement of the inner unidirectional component and the outer unidirectional component ensures the hydraulic balance and stability in the lower sliding hole 50 when the lower rod part 40 is extruded, thereby further ensuring the stability and reliability of the integral operation of the inner anti-deflection guide mechanism. The embodiments of the present application have been described above with reference to the accompanying drawings, in which the embodiments of the present application and features of the embodiments may be combined with each other without conflict, the present application is not limited to the above-described embodiments, which are merely illustrative, not restrictive, of the present application, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are protected by the present application.

Claims

1. A hole forming device of a master cylinder piston, comprising:

the fixing frame comprises an upper fixing plate (1), a lower fixing plate (2) and a plurality of guide rods (58) which are arranged between the upper fixing plate (1) and the lower fixing plate (2) and are distributed in a rectangular shape;

the sliding seat (3) is arranged on one side, close to the upper fixed plate (1), of the guide rod (58) in a sliding manner, and the sliding seat (3) is provided with a guide sleeve in sliding fit with the guide rod (58);

a driving cylinder (4), wherein one end of the upper fixed plate (1) facing the sliding seat (3) is provided with the driving cylinder (4) for driving the sliding seat (3) to move up and down;

the driving motor (5) is arranged on the sliding seat (3);

the outer anti-deflection limiting structure is fixedly arranged on a guide rod (58) at the lower side of the sliding seat (3);

the middle part of the outer deviation prevention limiting structure is provided with an inner deviation prevention guide mechanism fixedly connected with a driving shaft of a driving motor (5);

a drill chuck (6), wherein the drill chuck (6) is arranged at the other end of the inner anti-deflection guide mechanism;

wherein the outer anti-deviation limiting structure comprises:

The upper limiting plate (7), the said upper limiting plate (7) is fixedly connected with guide rod (58);

the outer limiting sleeve (8), the outer limiting sleeve (8) is arranged in the middle of the lower side of the upper limiting plate (7), a limiting hole is formed in the middle of the outer limiting sleeve (8), and a through hole which is coaxial with the limiting hole and has the same diameter is formed in the upper limiting plate (7);

wherein the inner anti-deviation guide mechanism extends out of the outer limit sleeve (8) after passing through the upper end of the upper limit plate (7);

wherein the inner anti-deviation guide mechanism comprises:

one end of the upper connecting rod is fixedly connected with a driving shaft of a driving motor (5);

wherein the upper connecting rod includes:

the upper rod body (9), the upper rod body (9) is fixedly connected with the output shaft of the driving motor (5) and penetrates into the outer limit sleeve (8);

the upper limiting disc (10) is propped against the end face of the middle anti-deflection assembly and is fixedly connected with the middle anti-deflection assembly;

The section of the lower limiting part (11) is in a regular polygon shape and extends into the middle anti-deflection assembly;

the middle anti-deviation assembly is arranged in the outer limit sleeve (8) in a sliding way and comprises:

the middle anti-deflection sleeve (12) is communicated with two ends of the middle anti-deflection sleeve (12), and a hole part matched with the lower limit part (11) is formed in the middle of the middle anti-deflection sleeve (12);

the outer spiral guide part (13) is integrally formed outside the middle anti-deflection sleeve (12), and the middle anti-deflection assembly is matched with the outer limit sleeve (8) through the outer spiral guide part (13);

the outer wall of the outer spiral guide part (13) is provided with a plurality of contact balls (14) which are distributed along the shape of the outer spiral guide part (13) and can freely roll, and the outer spiral guide part (13) is contacted with the outer limit sleeve (8) through the contact balls (14);

the middle anti-deviation assembly also comprises:

the outer wall of the outer spiral guide part (13) is provided with a plurality of threaded holes distributed along the shape of the outer spiral guide part (13), and each threaded hole is fixedly provided with an outer limit bolt (15) in a threaded manner;

Wherein the outer limit bolt (15) comprises:

the bolt handle (15 a), the bolt handle (15 a) is connected to the threaded hole in a threaded manner;

the bolt head (15 b) and the bolt handle (15 a) are integrally formed, and the cross section of the bolt head (15 b) is in a regular polygon;

the end face of the bolt head (15 b) is internally provided with a limiting spherical groove, the contact ball (14) freely rolls to be arranged in the limiting spherical groove, and part of the contact ball extends out of the limiting spherical groove;

an inner lubrication hole (15 c) which extends into the bolt handle (15 a) and is coaxially arranged with the bolt handle (15 a) is arranged in the limit spherical groove;

grease filled in the inner lubrication hole (15 c);

an outer flow limiting cover (15 d), wherein the outer side of the inner lubrication hole (15 c) is fixedly provided with the outer flow limiting cover (15 d), and the outer limiting cover is provided with an outer flow limiting hole;

the outer limiting filter cloth (15 e) is covered outside the outer limiting hole, and the outer limiting filter cloth (15 e) is covered outside the outer limiting hole.

2. The orifice forming apparatus for a master cylinder piston as set forth in claim 1, wherein said inner cushion connection assembly includes:

the upper buffering floating assembly is arranged in the middle anti-deflection sleeve (12);

The lower buffering floating assembly is arranged at the lower end of the middle anti-deflection sleeve (12) and is fixedly connected with the upper buffering floating assembly;

wherein said upper buffer floating assembly comprises:

the upper end of the upper floating connecting rod (16) is fixedly connected with the lower limit part (11);

the upper floating maintaining assembly is sleeved on the lower side of the upper floating connecting rod (16) and is in sliding fit with the upper floating connecting rod (16);

a middle floating retainer fixedly arranged on the lower side of the upper buffer floating assembly;

the lower floating connecting rod (17) is inserted into the lower floating retainer assembly at one end of the lower floating connecting rod (17) and is in sliding fit with the lower floating retainer assembly;

wherein, two ends of the middle floating retainer are respectively inserted into the end surfaces of the upper floating connecting rod (16) and the lower floating connecting rod (17) and are fixedly connected.

3. The hole forming device of the master cylinder piston according to claim 2, wherein one end of each of the upper floating connecting rod (16) and the lower floating connecting rod (17) is formed with a floating connecting portion (20) with a truncated cone-shaped cross section, the cross-sectional area of the floating connecting portion (20) decreases in a direction toward the bottom end face of the floating connecting portion (20), the floating connecting portion (20) of the upper floating connecting rod (16) is arranged downward, and the floating connecting portion (20) of the lower floating connecting rod (17) is arranged upward;

Wherein the upper floating maintaining component and the lower floating maintaining component have the same structure and are symmetrically arranged, and the upper floating maintaining component and the lower floating maintaining component comprise:

the outer cone-shaped retaining block (18), the outer cone-shaped retaining block (18) is coaxially provided with a floating hole (19), one end of the floating hole (19) is polygonal, and a frustum-shaped contraction opening which is matched with the floating connecting part (20) and limits the floating connecting part (20) and prevents the floating connecting part (20) from moving into the outer cone-shaped retaining block (18) is formed at one end of the floating hole;

the side float connecting piece, a plurality of side float connecting pieces according to circumference evenly distributed in the outside of outer cone shape keeper piece (18), side float connecting piece include:

the floating interference block (21) is arranged towards the outer wall of the outer cone-shaped holding block (18), and a cambered surface top is formed on one side of the floating interference block (21) towards the outer cone-shaped holding block (18);

the end part of the cambered surface top is inwards provided with a spherical placement groove, the spherical placement groove is internally provided with a free-rolling floating ball (22), the side floating connecting piece is propped against the outer cone-shaped retaining block (18) through the floating ball (22), and the side wall of the outer cone-shaped retaining block (18) is provided with an inner limit groove (23) matched with the floating ball (22);

The floating spring (24) is characterized in that a floating hole (19) is formed in the inner wall of the middle anti-deflection sleeve (12), the floating spring (24) is arranged in the floating hole (19), a contact part is formed in the floating hole (19) by the floating abutting block (21), and a rod part coaxially arranged with the floating spring (24) is formed in the floating hole (19) at the end face of the contact part.

4. A master cylinder piston bore forming apparatus as claimed in claim 3, wherein said intermediate floating retainer comprises:

the two end connecting rods (25) are arranged symmetrically up and down, the upper end connecting rod (25) is fixedly connected with the upper floating connecting rod (16), the lower end connecting rod (25) is fixedly connected with the lower floating connecting rod (17), and the section of the end connecting rod (25) is in a regular polygon;

the middle retaining sleeve (26) is arranged between the two end connecting rods (25), the two ends of the middle retaining sleeve (26) are provided with limiting end covers (27), the limiting end covers (27) are provided with regular polygon holes for the end connecting rods (25) to be inserted into, and regular polygon inner holes are formed in the middle retaining sleeve (26);

The two sides in the middle holding sleeve (26) are respectively provided with an end limiting bolt (28) for limiting one end of the end connecting rod (25) in the middle holding sleeve (26), and the section of the end limiting bolt (28) is in a regular polygon matched with the inner hole of the middle holding sleeve (26);

a middle disc spring (29), wherein the middle disc spring (29) is arranged in the middle retaining sleeve (26), and two ends of the middle disc spring (29) are respectively propped against the end surfaces of the end limiting bolts (28);

the middle part of the middle holding sleeve (26) is outwards extended to form an annular supporting disc (31), the two sides of the supporting disc (31) are respectively provided with the outer supporting springs (30), and the two ends of the outer supporting springs (30) are respectively propped against the supporting disc (31) and the bottom end surfaces of the outer cone-shaped holding blocks (18) on the side where the outer supporting springs are located.

5. The orifice forming apparatus for a master cylinder piston as set forth in claim 4, wherein said lower buffer float assembly includes:

the upper end of the outer floating connecting component is fixedly connected with the lower end of the middle anti-deflection sleeve (12), and the lower end of the outer floating connecting component is connected with the drill chuck (6);

The upper end of the inner floating connecting component is fixedly connected with the lower end of the lower floating connecting rod (17), and the other end of the inner floating connecting component extends into the bottom of the outer floating connecting component and is in sliding fit with the bottom of the outer floating connecting component;

wherein the outer floating connection assembly comprises:

the upper support sleeve (32), the lower end of the upper support sleeve (32) is fixedly connected with the lower end of the middle anti-deflection sleeve (12), and a regular polygon upper support part is formed on the lower side of the upper support sleeve (32);

the upper limit sleeve (33) is sleeved outside the lower side of the upper support sleeve (32), an upper limit hole matched with the upper support part is formed in the upper limit sleeve (33), an upper limit cover (34) is arranged at the upper end of the upper limit sleeve (33), an upper limit edge is formed on the upper side of the upper limit cover (34), and an upper limit groove matched with the upper limit edge in a sliding manner is formed on the side wall of the upper support sleeve (32);

the lower supporting sleeve (35) is integrally formed at the lower side of the upper limiting sleeve (33), and a regular polygon lower supporting part is formed at the lower part of the lower supporting sleeve (35);

the lower limit sleeve (36) is sleeved on the lower side of the lower support sleeve (35), a lower limit sleeve (36) is arranged on the lower side of the lower support sleeve (35), a lower limit hole matched with the lower support part is formed in the lower limit sleeve (36), a lower limit cover (37) is arranged at the upper end of the lower limit sleeve (36), a lower limit edge is formed on the upper side of the lower limit cover (37), and a lower limit groove matched with the lower limit edge in a sliding mode is formed on the side wall of the lower support sleeve (35).

6. The orifice forming apparatus for a master cylinder piston as set forth in claim 5, wherein said inner floating connection assembly includes:

an upper rod part (38), wherein an upper sealing edge (46) is formed at the upper part of the upper supporting sleeve (32), an upper bearing hole is formed in the middle part of the upper sealing edge (46), an upper sealing ring (41) is arranged on the inner wall of the upper bearing hole, and the upper rod part (38) is in sliding fit with the upper bearing hole;

the middle rod part (39), the middle rod part (39) is positioned in the upper limit sleeve (33) and the upper support sleeve (32);

the lower rod part (40) is provided with a lower sealing edge (47) at the lower part of the upper limit sleeve (33), a lower bearing hole is formed in the middle of the lower sealing edge (47), the inner wall of the lower bearing hole is provided with a lower sealing groove, and the lower rod part (40) penetrates through the lower bearing hole and extends to the bottom of the lower limit sleeve (36);

wherein a compression gap is formed between the lower end surface of the middle rod part (39) and the lower sealing edge (47); a lower sliding hole (50) which is in sliding fit with the lower rod part (40) is formed at the bottom of the lower limit sleeve (36), a lower buffer gap is formed between the bottom of the lower sliding hole (50) and the end face of the lower rod part (40), an inner sealing groove is arranged on the inner wall of the lower sliding hole (50), and an inner sealing ring (42) is arranged on the inner sealing groove.

7. The orifice forming apparatus for a master cylinder piston as set forth in claim 6, wherein said inner floating connection assembly further comprises:

the inner bearing sleeve (43), the lower side of the lower supporting sleeve (35) is provided with a lower anti-falling cover (44), an anti-falling hole is formed in the middle of the lower anti-falling cover (44), the inner bearing sleeve (43) passes through the anti-falling hole, an anti-falling edge (48) propped against the end face of the lower anti-falling cover (44) is formed at the upper end of the inner bearing sleeve (43), and an upper buffer gap is formed between the lower end of the inner bearing sleeve (43) and the bottom of the lower limiting sleeve (36);

the lower buffer disc spring (45), the said lower buffer disc spring (45) is set up in lower support sleeve (35), and one end is in contact with lower seal edge (47), another end is in contact with anti-drop edge (48);

the upper supporting sleeve (32) is communicated with the upper limiting sleeve (33), and the upper supporting sleeve (32) and the upper limiting sleeve (33) are filled with upper buffer filling liquid;

the lower supporting sleeve (35) and the lower limiting sleeve (36) are filled with lower buffer filling liquid;

the lower rod part (40) passes through the middle part of the inner bearing sleeve (43), a buffer connecting cavity is formed between the inner wall of the inner bearing sleeve (43) and the lower rod part (40), and the lower supporting sleeve (35) is communicated with the lower limiting sleeve (36) through the buffer connecting cavity; and a plurality of buffer connection holes communicated with the buffer connection cavity are arranged on the side wall of the inner bearing sleeve (43).

8. The orifice forming apparatus for a master cylinder piston as set forth in claim 7, wherein said inner floating connection assembly further comprises:

an inner floating buffer spring (57), wherein the inner floating buffer spring (57) is arranged in the lower sliding hole (50), and two ends of the inner floating buffer spring (57) are respectively propped against the bottom of the lower sliding hole (50) and the bottom end face of the lower rod part (40);

the lower sliding hole (50) is filled with inner buffer filling liquid;

an inner connecting runner (49), wherein an inner connecting runner (49) for communicating the lower sliding hole (50) and the buffer connecting cavity is formed on the lower rod part (40), and a first connecting pore and a second connecting pore are formed on one side of the inner connecting runner (49) connected with the lower sliding hole (50);

an inward one-way component is arranged on the first connecting pore canal;

wherein the first connecting pore canal is in a stepped hole shape, and comprises a first inward hole with decreasing diameter inwards from the end surface of the lower rod part (40), a second inward hole and a third inward hole; the inward unidirectional assembly comprises a limit plug (51), the limit plug (51) is in threaded connection with a first inward hole, an inward conical hole is formed in the middle of the limit plug (51), the diameter of the inward conical hole decreases inwards from the end face of the lower rod part (40), an inward valve ball (52) capable of blocking the inward conical hole is arranged on the inner side of the inward conical hole, an inward supporting spring (53) is arranged in a second inward hole, one end of the inward supporting spring (53) abuts against the end face of the second inward hole, and the other end of the inward supporting spring abuts against the inward valve ball (52); the second connecting pore canal is stepped and inwards comprises a first outwards-shaped hole, a outwards-shaped conical hole and a second outwards-shaped hole, the diameter of the first outwards-shaped hole is gradually decreased from the end face of the lower rod part (40), the outwards-shaped unidirectional component comprises a limiting plug sleeve (54), the limiting plug sleeve (54) is in threaded connection with the first outwards-shaped hole, one side, facing the end face of the lower rod part (40), of the limiting plug sleeve (54) is provided with a closed end, the closed end is provided with a outwards-shaped runner hole, the limiting plug sleeve (54) is internally provided with a outwards-shaped guide spring (56), and the outwards-shaped conical hole is provided with a outwards-shaped valve ball (55) capable of blocking the outwards-shaped conical hole; one end of the outer guide spring (56) is propped against the outward valve ball (55), and the other end is propped against the closed end of the limit plug sleeve (54).